From 1111dcab65ca83f175f1bb9c0496cae24fbfb7c2 Mon Sep 17 00:00:00 2001
From: Nicholas Chin <nic.c3.14@gmail.com>
Date: Wed, 31 Jan 2024 22:07:25 -0700
Subject: [PATCH 21/39] mb/dell: Add Latitude E6520 (Sandy Bridge)

Mainboard is PAL60/LA-6562P (UMA). The version with an Nvidia dGPU was
not tested. I do not physically have this system; someone with physical
access to one sent me the output of autoport which I then modified to
produce this port. I was also sent the VBT binary, which was obtained
from `/sys/kernel/debug/dri/0/i915_vbt` while running version A08 of the
vendor firmware.

This was originally tested and found to be working as a standalone board
port in Libreboot, but this variant based port in upstream coreboot has
not been tested.

This can be internally flashed by sending a command to the EC, which
causes the EC to pull the FDO pin low and the firmware to skip setting
up any chipset based write protections [1]. The EC is the SMSC MEC5055,
which seems to be compatible with the existing MEC5035 code.

[1] https://gitlab.com/nic3-14159/dell-flash-unlock

Change-Id: Ibdd40cc15642b8d404159d5962670ccc4167a9ec
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
---
 src/mainboard/dell/snb_ivb_latitude/Kconfig   |   9 +
 .../dell/snb_ivb_latitude/Kconfig.name        |   3 +
 .../snb_ivb_latitude/variants/e6520/data.vbt  | Bin 0 -> 6144 bytes
 .../variants/e6520/early_init.c               |  31 +++
 .../snb_ivb_latitude/variants/e6520/gpio.c    | 190 ++++++++++++++++++
 .../variants/e6520/hda_verb.c                 |  32 +++
 .../variants/e6520/overridetree.cb            |  35 ++++
 7 files changed, 300 insertions(+)
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6520/data.vbt
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6520/early_init.c
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6520/gpio.c
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6520/hda_verb.c
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6520/overridetree.cb

diff --git a/src/mainboard/dell/snb_ivb_latitude/Kconfig b/src/mainboard/dell/snb_ivb_latitude/Kconfig
index d2786970ee..72bdc96c0a 100644
--- a/src/mainboard/dell/snb_ivb_latitude/Kconfig
+++ b/src/mainboard/dell/snb_ivb_latitude/Kconfig
@@ -23,6 +23,12 @@ config BOARD_DELL_LATITUDE_E6420
 	select MAINBOARD_USES_IFD_GBE_REGION
 	select SOUTHBRIDGE_INTEL_BD82X6X
 
+config BOARD_DELL_LATITUDE_E6520
+	select BOARD_DELL_SNB_IVB_LATITUDE_COMMON
+	select BOARD_ROMSIZE_KB_10240
+	select MAINBOARD_USES_IFD_GBE_REGION
+	select SOUTHBRIDGE_INTEL_BD82X6X
+
 config BOARD_DELL_LATITUDE_E5530
 	select BOARD_DELL_SNB_IVB_LATITUDE_COMMON
 	select BOARD_ROMSIZE_KB_12288
@@ -50,6 +56,7 @@ config MAINBOARD_DIR
 
 config MAINBOARD_PART_NUMBER
 	default "Latitude E6420" if BOARD_DELL_LATITUDE_E6420
+	default "Latitude E6520" if BOARD_DELL_LATITUDE_E6520
 	default "Latitude E5530" if BOARD_DELL_LATITUDE_E5530
 	default "Latitude E6430" if BOARD_DELL_LATITUDE_E6430
 	default "Latitude E6530" if BOARD_DELL_LATITUDE_E6530
@@ -62,11 +69,13 @@ config USBDEBUG_HCD_INDEX
 
 config VARIANT_DIR
 	default "e6420" if BOARD_DELL_LATITUDE_E6420
+	default "e6520" if BOARD_DELL_LATITUDE_E6520
 	default "e5530" if BOARD_DELL_LATITUDE_E5530
 	default "e6430" if BOARD_DELL_LATITUDE_E6430
 	default "e6530" if BOARD_DELL_LATITUDE_E6530
 
 config VGA_BIOS_ID
+	default "8086,0116" if BOARD_DELL_LATITUDE_E6520
 	default "8086,0166" if BOARD_DELL_LATITUDE_E5530
 	default "8086,0126" if BOARD_DELL_LATITUDE_E6420
 	default "8086,0166" if BOARD_DELL_LATITUDE_E6430 \
diff --git a/src/mainboard/dell/snb_ivb_latitude/Kconfig.name b/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
index 257d428a70..c7665ac263 100644
--- a/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
+++ b/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
@@ -3,6 +3,9 @@
 config BOARD_DELL_LATITUDE_E6420
 	bool "Latitude E6420"
 
+config BOARD_DELL_LATITUDE_E6520
+	bool "Latitude E6520"
+
 config BOARD_DELL_LATITUDE_E5530
 	bool "Latitude E5530"
 
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6520/data.vbt b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/data.vbt
new file mode 100644
index 0000000000000000000000000000000000000000..0ef16ee7cb482d2cb91ea80c3f419759355f7ba0
GIT binary patch
literal 6144
zcmeHKZ){Ul6hE);wSB#PZ|mL$bQ^!}HW(eF@H)0JafGfbqsZ9G21{L7Sg{or$5uN)
z_QgG55e!O(8p8*oBhhF`l$n^QF%rN;rzFNqqcPzFCd5QSB1Y7RKt1=pmTk1aFo9^Y
z+x+gi_nvdlJ@?#m&wZWW=G#bH>ze$J`&!oe*Q|E0r!)d89LYY8b$aowZEoG-uiIF+
z#n;$ezm6V<nGnvtc?lrGaf)1_);!W0?uqnojdw-1MQM|dwy`OcF?M@A)KgVV*N2}7
zcXx+--0R}IwzW3-+`f2k?^Av5V7MpRO-q(9rn_R1@Xlz2Ztdy`$Gf6^w6~|bKi!!7
z9;xq*^~bxmZQn^<^<`+2s=BdSM%VW2#FguN<FO^QuDhGIFquBu677q|cSj>jWFixQ
z)4V8f0Gt`D`+>9Fr~tnJ76EJ`5D_F1cn-`0$RgN9unI6kfYkzIiO?W`ON4+34lv1_
zNdPDkq1cf$p8^EW;TS*O$CdzNo#1fbIG_Oi0T(ti0jwyt0le_p_HlvX^CFvr)>$b>
zO-z8^CSU`w=mIK7Q)@9fR;XUzrFu{T=rRyygIZBpU9+Or>+?4R9%~G?Y-|g)Z`Sti
z+do(U*Wb-xR~DzjS<75#=Us4sH^C9U2FCbND7L7u$>M|<;t=AnRfI9C0v8c~AVg7t
zIU<3D2oK^>L;%r(*o=4*u?Mja@dDyi#4zFn;(f#^#3*76aUSs#;tJv#La-6YLRdQB
zdcvfERkvH?k~GJlfM<HR476j(@nfm+47<!Ult@^ua5M3h6A}q=C0ognX9aX4mxq)U
zXOhm=DbLene?C%_16Q)2NRV@Yacz`D;{V>Ve-1?&ZXy}n)YwnVAgNlz#zX;=IX)-F
z)9LL3lbEdY5Co)LsK?vP)7s}G(5xduE!Y!#Wgh<IN3(3ey=-oWU(9aEJ_HzV53Jbq
zj5B5RjzLUt>_T&xi$uUA#0e}X3D~`J(bHz;DgTa@GrpW6=>eZwJeNYYo*GjF=``;(
zuoQ3|V5YoKd$j=KK{`uSX*DeU1oJg=+RT6)rLe6%2>Ci^!5ao=*gS}wFN=nUf`fTF
zM?Gb5ycWjM7I?MJ!2;w|LFg=UoLq-ytr2iemG)AsW}bI4X9PK}T5UKsQi7anu=tD6
zf|={kXkNeQBD>6bQ3taC8XJOJ^e40_ydyfr&a41L^1)jNrK<B_wV}+ZE`p;QK=rDz
zTw`SJ+e`Oc*icaF4INF51Xg*~ts@m)@9ETt(*@N7yy0)Ddce%i9{^k2kbd8=Wns~P
zWBD$~himxDharxF@f!ti^0$~9Zxt{tg`@Dbl_0Ki2Xp_MEw-<z6qgep;XYmR%Dl-F
z%3cBfcN;Avikpz-gmw_6mymu!Unk0YgnUfsk3{*6kQ;=S*p(_fS!JhDyYh^k?6uRk
z?8--W@~NHvY*+ra6SG9iC1s^V)<|@Rqzp*pd5NBslrs`JC(&Oeg~v}CnJ$x+)iP<8
z=`LA0Ad@39{XkZ}kjXbP{YzHtS!70*yy%LcnJ#cz4u%*Wq!^d*AVMZdr&l=#Qgik~
ze2l)cX+!kF9EaFhY;0^Uo_#VNC?7K2Tf=ZR1y5);b!mCGG?<cc#M0rtHKYeKi%BE?
z@Y6|P8fx#li}c`Uv24UGyZaM0To;Ep<_AWZA1t~bFgI)uf}&Eq=L_Cs89=>wnT0Vx
z-jp>o1ffJNommZ4?=TIPlePIw0hgQ706f*tBC`#pg>9&zRHe>J2%RxBTrOc6Adh9E
ziJr`?VQH!N!_GkoKaoq|+3$^Ae0#sUxXlmM1Huq~g<=Ls?ILv+nQcH%PQedGOlH=Q
z77rMcJlH4Mkc#U2(IDv>rsm1aHpsdL_RdT^i_ACcQUMIJcSus}*(?CIiy^#^=t=g1
z+*^Zbh30&^#_bKclSy9pL$<B~pK8m*sLpIdnHM@W$nA7Ea@Z`x27K?aNK<@lCW(2L
zb@kB3H8kKy4W3Hu)NN|kd!DL^o#iR9a{QYV-Wl&r&hmIFX{ezkIV<4zFiVUQ@K>ao
z00DnFy~Uek!JRwhVX!of0)$Sa*X^S~LMQH0<E(UUx}L=|;Kgw(r(4q=nD)T52c|tR
O?SW|zOncy=dEg(6JAK&z

literal 0
HcmV?d00001

diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6520/early_init.c b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/early_init.c
new file mode 100644
index 0000000000..b6415a428b
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/early_init.c
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <device/pci_ops.h>
+#include <ec/dell/mec5035/mec5035.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+
+const struct southbridge_usb_port mainboard_usb_ports[] = {
+	{ 1, 1, 0 },
+	{ 1, 1, 0 },
+	{ 1, 1, 1 },
+	{ 1, 1, 1 },
+	{ 1, 0, 2 },
+	{ 1, 1, 2 },
+	{ 1, 0, 3 },
+	{ 1, 0, 3 },
+	{ 1, 1, 5 },
+	{ 1, 1, 5 },
+	{ 1, 1, 7 },
+	{ 1, 1, 6 },
+	{ 1, 0, 6 },
+	{ 1, 0, 7 },
+};
+
+void bootblock_mainboard_early_init(void)
+{
+	pci_write_config16(PCH_LPC_DEV, LPC_EN, CNF1_LPC_EN | MC_LPC_EN
+			| KBC_LPC_EN | FDD_LPC_EN | LPT_LPC_EN
+			| COMB_LPC_EN | COMA_LPC_EN);
+	mec5035_early_init();
+}
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6520/gpio.c b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/gpio.c
new file mode 100644
index 0000000000..61f01816c4
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/gpio.c
@@ -0,0 +1,190 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <southbridge/intel/common/gpio.h>
+
+static const struct pch_gpio_set1 pch_gpio_set1_mode = {
+	.gpio0 = GPIO_MODE_GPIO,
+	.gpio1 = GPIO_MODE_NATIVE,
+	.gpio2 = GPIO_MODE_GPIO,
+	.gpio3 = GPIO_MODE_NATIVE,
+	.gpio4 = GPIO_MODE_GPIO,
+	.gpio5 = GPIO_MODE_NATIVE,
+	.gpio6 = GPIO_MODE_GPIO,
+	.gpio7 = GPIO_MODE_GPIO,
+	.gpio8 = GPIO_MODE_GPIO,
+	.gpio9 = GPIO_MODE_NATIVE,
+	.gpio10 = GPIO_MODE_NATIVE,
+	.gpio11 = GPIO_MODE_NATIVE,
+	.gpio12 = GPIO_MODE_NATIVE,
+	.gpio13 = GPIO_MODE_GPIO,
+	.gpio14 = GPIO_MODE_GPIO,
+	.gpio15 = GPIO_MODE_GPIO,
+	.gpio16 = GPIO_MODE_GPIO,
+	.gpio17 = GPIO_MODE_GPIO,
+	.gpio18 = GPIO_MODE_NATIVE,
+	.gpio19 = GPIO_MODE_GPIO,
+	.gpio20 = GPIO_MODE_NATIVE,
+	.gpio21 = GPIO_MODE_GPIO,
+	.gpio22 = GPIO_MODE_GPIO,
+	.gpio23 = GPIO_MODE_NATIVE,
+	.gpio24 = GPIO_MODE_GPIO,
+	.gpio25 = GPIO_MODE_NATIVE,
+	.gpio26 = GPIO_MODE_NATIVE,
+	.gpio27 = GPIO_MODE_GPIO,
+	.gpio28 = GPIO_MODE_GPIO,
+	.gpio29 = GPIO_MODE_GPIO,
+	.gpio30 = GPIO_MODE_GPIO,
+	.gpio31 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_direction = {
+	.gpio0 = GPIO_DIR_INPUT,
+	.gpio2 = GPIO_DIR_INPUT,
+	.gpio4 = GPIO_DIR_INPUT,
+	.gpio6 = GPIO_DIR_INPUT,
+	.gpio7 = GPIO_DIR_INPUT,
+	.gpio8 = GPIO_DIR_INPUT,
+	.gpio13 = GPIO_DIR_INPUT,
+	.gpio14 = GPIO_DIR_INPUT,
+	.gpio15 = GPIO_DIR_INPUT,
+	.gpio16 = GPIO_DIR_INPUT,
+	.gpio17 = GPIO_DIR_INPUT,
+	.gpio19 = GPIO_DIR_INPUT,
+	.gpio21 = GPIO_DIR_INPUT,
+	.gpio22 = GPIO_DIR_INPUT,
+	.gpio24 = GPIO_DIR_INPUT,
+	.gpio27 = GPIO_DIR_INPUT,
+	.gpio28 = GPIO_DIR_INPUT,
+	.gpio29 = GPIO_DIR_INPUT,
+	.gpio30 = GPIO_DIR_OUTPUT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_level = {
+	.gpio30 = GPIO_LEVEL_HIGH,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_reset = {
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_invert = {
+	.gpio0 = GPIO_INVERT,
+	.gpio8 = GPIO_INVERT,
+	.gpio14 = GPIO_INVERT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_blink = {
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_mode = {
+	.gpio32 = GPIO_MODE_NATIVE,
+	.gpio33 = GPIO_MODE_GPIO,
+	.gpio34 = GPIO_MODE_GPIO,
+	.gpio35 = GPIO_MODE_GPIO,
+	.gpio36 = GPIO_MODE_GPIO,
+	.gpio37 = GPIO_MODE_GPIO,
+	.gpio38 = GPIO_MODE_GPIO,
+	.gpio39 = GPIO_MODE_GPIO,
+	.gpio40 = GPIO_MODE_NATIVE,
+	.gpio41 = GPIO_MODE_NATIVE,
+	.gpio42 = GPIO_MODE_NATIVE,
+	.gpio43 = GPIO_MODE_NATIVE,
+	.gpio44 = GPIO_MODE_NATIVE,
+	.gpio45 = GPIO_MODE_GPIO,
+	.gpio46 = GPIO_MODE_NATIVE,
+	.gpio47 = GPIO_MODE_NATIVE,
+	.gpio48 = GPIO_MODE_GPIO,
+	.gpio49 = GPIO_MODE_GPIO,
+	.gpio50 = GPIO_MODE_NATIVE,
+	.gpio51 = GPIO_MODE_GPIO,
+	.gpio52 = GPIO_MODE_GPIO,
+	.gpio53 = GPIO_MODE_NATIVE,
+	.gpio54 = GPIO_MODE_GPIO,
+	.gpio55 = GPIO_MODE_NATIVE,
+	.gpio56 = GPIO_MODE_NATIVE,
+	.gpio57 = GPIO_MODE_GPIO,
+	.gpio58 = GPIO_MODE_NATIVE,
+	.gpio59 = GPIO_MODE_NATIVE,
+	.gpio60 = GPIO_MODE_GPIO,
+	.gpio61 = GPIO_MODE_NATIVE,
+	.gpio62 = GPIO_MODE_NATIVE,
+	.gpio63 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_direction = {
+	.gpio33 = GPIO_DIR_INPUT,
+	.gpio34 = GPIO_DIR_OUTPUT,
+	.gpio35 = GPIO_DIR_INPUT,
+	.gpio36 = GPIO_DIR_INPUT,
+	.gpio37 = GPIO_DIR_INPUT,
+	.gpio38 = GPIO_DIR_INPUT,
+	.gpio39 = GPIO_DIR_INPUT,
+	.gpio45 = GPIO_DIR_OUTPUT,
+	.gpio48 = GPIO_DIR_INPUT,
+	.gpio49 = GPIO_DIR_OUTPUT,
+	.gpio51 = GPIO_DIR_INPUT,
+	.gpio52 = GPIO_DIR_INPUT,
+	.gpio54 = GPIO_DIR_INPUT,
+	.gpio57 = GPIO_DIR_INPUT,
+	.gpio60 = GPIO_DIR_OUTPUT,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_level = {
+	.gpio34 = GPIO_LEVEL_HIGH,
+	.gpio45 = GPIO_LEVEL_LOW,
+	.gpio49 = GPIO_LEVEL_LOW,
+	.gpio60 = GPIO_LEVEL_HIGH,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_reset = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_mode = {
+	.gpio64 = GPIO_MODE_NATIVE,
+	.gpio65 = GPIO_MODE_NATIVE,
+	.gpio66 = GPIO_MODE_NATIVE,
+	.gpio67 = GPIO_MODE_NATIVE,
+	.gpio68 = GPIO_MODE_GPIO,
+	.gpio69 = GPIO_MODE_GPIO,
+	.gpio70 = GPIO_MODE_GPIO,
+	.gpio71 = GPIO_MODE_GPIO,
+	.gpio72 = GPIO_MODE_NATIVE,
+	.gpio73 = GPIO_MODE_NATIVE,
+	.gpio74 = GPIO_MODE_NATIVE,
+	.gpio75 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_direction = {
+	.gpio68 = GPIO_DIR_INPUT,
+	.gpio69 = GPIO_DIR_INPUT,
+	.gpio70 = GPIO_DIR_INPUT,
+	.gpio71 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_level = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_reset = {
+};
+
+const struct pch_gpio_map mainboard_gpio_map = {
+	.set1 = {
+		.mode		= &pch_gpio_set1_mode,
+		.direction	= &pch_gpio_set1_direction,
+		.level		= &pch_gpio_set1_level,
+		.blink		= &pch_gpio_set1_blink,
+		.invert		= &pch_gpio_set1_invert,
+		.reset		= &pch_gpio_set1_reset,
+	},
+	.set2 = {
+		.mode		= &pch_gpio_set2_mode,
+		.direction	= &pch_gpio_set2_direction,
+		.level		= &pch_gpio_set2_level,
+		.reset		= &pch_gpio_set2_reset,
+	},
+	.set3 = {
+		.mode		= &pch_gpio_set3_mode,
+		.direction	= &pch_gpio_set3_direction,
+		.level		= &pch_gpio_set3_level,
+		.reset		= &pch_gpio_set3_reset,
+	},
+};
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6520/hda_verb.c b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/hda_verb.c
new file mode 100644
index 0000000000..ae376691e7
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/hda_verb.c
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/azalia_device.h>
+
+const u32 cim_verb_data[] = {
+	0x111d76e7,	/* Codec Vendor / Device ID: IDT */
+	0x10280494,	/* Subsystem ID */
+	11,		/* Number of 4 dword sets */
+	AZALIA_SUBVENDOR(0, 0x10280494),
+	AZALIA_PIN_CFG(0, 0x0a, 0x03a11020),
+	AZALIA_PIN_CFG(0, 0x0b, 0x0321101f),
+	AZALIA_PIN_CFG(0, 0x0c, 0x400000f0),
+	AZALIA_PIN_CFG(0, 0x0d, 0x90170110),
+	AZALIA_PIN_CFG(0, 0x0e, 0x23011050),
+	AZALIA_PIN_CFG(0, 0x0f, 0x23a1102e),
+	AZALIA_PIN_CFG(0, 0x10, 0x400000f3),
+	AZALIA_PIN_CFG(0, 0x11, 0x400000f2),
+	AZALIA_PIN_CFG(0, 0x1f, 0x400000f0),
+	AZALIA_PIN_CFG(0, 0x20, 0x400000f0),
+
+	0x80862805,	/* Codec Vendor / Device ID: Intel */
+	0x80860101,	/* Subsystem ID */
+	4,		/* Number of 4 dword sets */
+	AZALIA_SUBVENDOR(3, 0x80860101),
+	AZALIA_PIN_CFG(3, 0x05, 0x18560010),
+	AZALIA_PIN_CFG(3, 0x06, 0x18560020),
+	AZALIA_PIN_CFG(3, 0x07, 0x18560030),
+};
+
+const u32 pc_beep_verbs[0] = {};
+
+AZALIA_ARRAY_SIZES;
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6520/overridetree.cb b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/overridetree.cb
new file mode 100644
index 0000000000..f90f2dee1f
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6520/overridetree.cb
@@ -0,0 +1,35 @@
+## SPDX-License-Identifier: GPL-2.0-or-later
+
+chip northbridge/intel/sandybridge
+	device domain 0 on
+		subsystemid 0x1028 0x0494 inherit
+
+		device ref igd on
+			register "gpu_cpu_backlight" = "0x00001312"
+			register "gpu_pch_backlight" = "0x13121312"
+		end
+
+		chip southbridge/intel/bd82x6x
+			register "usb_port_config" = "{
+				{ 1, 1, 0 },
+				{ 1, 1, 0 },
+				{ 1, 1, 1 },
+				{ 1, 1, 1 },
+				{ 1, 0, 2 },
+				{ 1, 1, 2 },
+				{ 1, 1, 3 },
+				{ 1, 1, 3 },
+				{ 1, 1, 5 },
+				{ 1, 1, 5 },
+				{ 1, 1, 7 },
+				{ 1, 1, 6 },
+				{ 1, 0, 6 },
+				{ 1, 0, 7 },
+			}"
+
+			device ref sata1 on
+				register "sata_port_map" = "0x3b"
+			end
+		end
+	end
+end
-- 
2.39.2

